Slitting machine



Feb. 27, 1934. H, E. wANER SLITTING MACHINE Filed Oct. 31, l1933 a ,ff

naif/27E E555/ ZF-Nanas Patented Feb. 27, 1934 UNITED Vs'rnras PATENTOFFICE 1,949,066 su'r'rme MACHINE Harry E. Waner, Akron, Ohio, assignerto The B. F. Goodrich Company, New York, N. Y., a f corporation oi' NewYork Application October 31, 1933. Serial No. 696,044

6 Claims. (Cl. 16481) This invention relates to apparatus for slittingstantially the distance between the collar 24 and sheet material intonarrow bands, and is cspethe box 15. Adjacent the boxv15, however, thecially useful in the production of narrow bands arbor is threaded as at26 and a correspondingly or tapes of vulcanized or unvulcanzed rubber.threaded collar 2'Iis mountedthereontoclamp the The principal objects ofthe invention are to cutters and compress the cushion. 60

provide for equalization of pressure over a plu- Thev cutter arrangementon the lower arbor rality of cutters mounted on the same shaft, tocomprises a plurality of hardened steel discs 28 provide equalizationregardless of eccentricity of having convex V-shaped peripheries andhaving a the Vcutters or flexing of the shaft, to accomplish largeenough central aperture to pass over the 1o division of a wide sheetinto extremely narrow cushion 25. A series of spacer rings 29 o smaller65 bands, to maintain uniform width oi the bands, outside diameter arelocated each between two and to provide for cutting the bands by a pinchcutter discs.

cut. To hold the cutter discs in place a loose collar Other objects willappear from the following 30 having a central opening as large as thediam- 15 description and the accompanying drawing. eter of the rubbercushion is located between one 70 Of the drawing: end of the rank ofcutters and the collar 24 and Fig. 1 is a front elevation o a preferredform a similar loose collar 3l is located between the of the cuttingdevice, part of the cutters being other end of the rank of cutters andthe threaded removed and part of the cushions being broken collar 27.Collar 27 is provided with a reduced 2 away to show the construction.shoulder portion 32 which extends partly through 75 Fig. 2 is asectional view taken on line 2--2 the opening in collar 31 so as toengage the end of Fig. l, and, in addition, showing parts of conof therubber cushion. With the cutters in place, veyors for delivering thesheet and receiving the collar 27 is screwed toward the cutters, andenbands, other parts being broken away. gagingV the end of the cushioncompresses the g5 Fig. 3 is a detail sectional view taken in the cushionaxially. As rubber is practically incom- 30 plane of the axes ot thecutter arbors, and Showpressible volumetrically but distorts underpresing a sheet of material between the cutters, only sure, the endwisecompression of the cushion a small number of the cutters being shown,and causes a thickening of the walls whereby the cutonly the adjacentportions of the supporting cushters are frictionally engaged againstrotative 3@ ions and mandrels being shown, other parts bemovement withrelation to their arbor. Any 85 ing broken away. slight eccentricity ofthe cutters is compensated Referring to the drawing. the numeral deS- bythe ability of the cutters individually to move ignteS a bed platePrOVided With vertically 510tperpendicular to the axis of the arbor, therubber ted frame members 11, 12 connected at their updisplaced by anysuch movement toward the axis f5 per extremities by a tie bar 13.Members 11, 12 acting to raise adjoining cutters to the same 90 arefitted with boxes 14, 15 which engage their radial altitude, SlottedPortions and provide means fOr journal The construction of the cutterholding means on ling a 10W1` Cutter albOl 16- The upper arbor the upperarbor is similar but the cutters are oi.'l l'l iS rotatably mOllIltBdirl bOXSS 18Y 19 adapted different contour. 'I'he cutters 33 arepreferably to slide vertically in the slotted frame members.square-facedproviding corners which engage the 95 The lower arbOl iSDTOVded With a Sprocket 20 beveled shoulders of the cutters 28 and pinchthe whereby it may be driven fIOm a Convenient sheet material to thepoint ofA separation. Each Source of power (HOU ShOWn) by a Chain 21 ItiS squarevfaced cutter is arranged between two cut-v aTSO Provided Witha PirlOn 22 Which meshes with ters 28 and spacer discs 34 are providedbetween a similar pinion 23 0n the upper arbor whereby each pair ofcutters 33. The cutters 33 are 100 that arbor is driven in unison Withthe IOWer cushioned and frictionally held in the same manarbor. ner asthe cutters 28.

To restrain the arbor from end movement, and In order to maintain thearbors in proper relafor other purposes, the lower arbor 16 has anintion, spacing screws 35, 36, are threaded to entegral collar 24adjacent the inner extremity of gage threaded openings in boxes 18 and19, and 105 the box 14. This collar also acts as a shoulder their headsengage the boxes 14 and 15. Presto retain the cutters. sure screws 37,38 are threaded through the tie- To cushion the cutters and tocompensate for bar 13 and engage the boxes 18, 19. deflection andeccentricty, a sleeve 25 of resilient The material to be cut isdelivered in a wide rubber extends over the arbor 16 throughoutsubsheet, a conveyor 39 being provided to lead the no sheet 40 betweenthe arborsl AS the material passes between the cutters, the convex facesof the discs 28 stretch the sheet laterally to form longitudinalcorrugations therein, as shown in Fig. 3. The lateral stretching effectsseparation of the strips as they are cut by pressure between the cornersof the discs 33 and the beveled faces of the discs 28. The finishedstrips 41 are received by a conveyor 42 as they pass from the machine.

The cushion rubber, on which the cutters are mounted, not onlycompensates for eccentrlcity of the cutters, but also compensates forany deflection of the arbors. The cushioning structure is such thatrelatively thin cutter discs 28, 33, may be used and therefore tapes ofvery narrow width may be produced.

I claim:

1. Apparatus for slitting sheet material, said apparatus comprising apair of parallel rotatable arbors, at least one of said arbors beingsurrounded by a resilient rubber cushion, and having a plurality of disccutters mounted on said cushion for rolling engagement with anvil meanscarried by the other arbor.

2. Apparatus for slitting sheet material, said apparatus comprising apair of parallel rotatable arbors, each arbor having a cylindricalcushion of resilient rubber mounted thereon, and a plurality of discscarried by each cushion for cooperation with the cutting discs similarlymounted on the other arbor.

3. Apparatus for slitting sheet material, said apparatus comprising apair of parallel rotatable arbors, cutting means carried by one arbor, a

resilient rubber cushion located between the cutting means and itsarbor, anvil means carried by the other arbor, and a resilient cushionlocated between the second arbor and the anvil means.

4. Apparatus for slitting sheet material, said apparatus comprising apair of parallel rotatable arbors, a plurality of discs mounted on onearbor in spaced relation, each disc having a periphery convex incross-section, a plurality of discs mounted on the arbor in spacedrelation, each of said last named discs having a cylindrical peripheryand being mounted to contact at its edges with the shoulders of twoadjacent discs on the other arbor.

5. Apparatus for slitting sheet material, said apparatus comprising arotatable arbor, a resilient rubber cushion surrounding said arbor, aplurality of cutting discs surrounding said cushion in spaced relation,means for axially compressing said cushion whereby it is thickenedfrictionally to retain said discs, and rotatable means for cooperatingwith said discs for cutting the sheet material.

6. Apparatus for slitting sheet material, said apparatus comprising arotatable arbor, a resilient rubber cushion surrounding said arbor, a

plurality of cutting discs surrounding said cushion in spaced relation,each of said discs having a cylindrical periphery having cutting edges,means for axially compressing said cushion to frictionally retain saiddiscs on said arbor, a second arbor mounted parallel to the rst namedarbor, and a plurality of anvil discs carried thereby in spacedrelation, each anvil disc having a periphery convex in cross-section andcontacting with the edges of two of said cutting discs.

HARRY E. WANER.

